// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/renderer_host/p2p/socket_host_throttler.h"

#include <utility>

#include "third_party/webrtc/base/ratelimiter.h"
#include "third_party/webrtc/base/timeutils.h"

namespace content {

namespace {

    const int kMaxIceMessageBandwidth = 256 * 1024;

} // namespace

P2PMessageThrottler::P2PMessageThrottler()
    : rate_limiter_(new rtc::RateLimiter(kMaxIceMessageBandwidth, 1.0))
{
}

P2PMessageThrottler::~P2PMessageThrottler()
{
}

void P2PMessageThrottler::SetSendIceBandwidth(int bandwidth_kbps)
{
    rate_limiter_.reset(new rtc::RateLimiter(bandwidth_kbps, 1.0));
}

bool P2PMessageThrottler::DropNextPacket(size_t packet_len)
{
    double now = rtc::TimeNanos() / static_cast<double>(rtc::kNumNanosecsPerSec);
    if (!rate_limiter_->CanUse(packet_len, now)) {
        // Exceeding the send rate, this packet should be dropped.
        return true;
    }

    rate_limiter_->Use(packet_len, now);
    return false;
}

} // namespace content
